Dilute nitride triple junction solar cells for space applications: Progress towards highest AM0 efficiency,Progress in Photovoltaics

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Dilute nitride triple junction solar cells for space applications: Progress towards highest AM0 efficiency
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2018-04-10 , DOI: 10.1002/pip.3011
Arto Aho ₁ , Riku Isoaho ₁ , Antti Tukiainen ₁ , Gabriele Gori ₂ , Roberta Campesato ₂ , Mircea Guina ₁

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We report a detailed performance assessment of triple junction dilute nitride solar cells fabricated by a combined molecular beam epitaxy–metal organic chemical vapor deposition process and designed for space applications. The experimental sample exhibits an efficiency level of 30.8% under AM0 illumination. Analyses of the isotype single junction dilute nitride bottom cells reveal a band gap voltage offset of 0.49 V at one sun illumination and a value as low as 0.47 V for full spectrum excitation without filter layers. The analyses point out the limitation of the design in terms of current balancing. With optimized design, an efficiency of 32.1% is possible, revealing the maturity reached by dilute nitride technology in the quest for improving the efficiency of lattice‐matched multijunction solar cells.

中文翻译：

用于太空应用的稀氮化物三结太阳能电池：朝最高AM0效率迈进

我们报告了通过结合分子束外延-金属有机化学气相沉积工艺制造并设计用于太空应用的三结稀氮化硅太阳能电池的详细性能评估。实验样品在AM0照明下显示出30.8％的效率水平。同型单结稀氮化物底部电池的同型分析显示，在一次阳光照射下，带隙电压偏移为0.49 V，对于不带滤光片层的全光谱激发，其带隙电压偏移低至0.47V。分析指出了电流平衡方面设计的局限性。通过优化设计，可以实现32.1％的效率，这表明稀氮化物技术已达到成熟度，以寻求提高晶格匹配的多结太阳能电池的效率。

更新日期：2018-04-10

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